ML-Implode News - John Butler - Insider Anecdotes of Official Forex Manip. via Gold

As the professor explained in his comments, covert, non-coordinated interventions would probably leave a â€˜footprint', that is, they would take place at times of low market liquidity and tend to continue until an important chart pattern has emerged that encourages speculators to reverse the previous market trend, thereby initiating a new one in line with the intervention's objectives.
Looking around various FX rates, there is some evidence that covert intervention has been taking place in Asia. Occasional, sharp overnight moves on unusually high volume have taken place in the Korean won, Taiwan dollar, Indonesian rupiah, Malaysian ringitt and Vietnamese dong.

Sounds a lot like what we here have guessed at, though really it is blindingly obvious to anyone willing to take more than a cursory look at the evidence; only a panglossian media and partisan Wall Street could pretend otherwise.

Relevant:

John Butler - Insider Anecdotes of Official Forex Manip. via Gold